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[igraph] question about vertex names

From: Qunawei Zhang
Subject: [igraph] question about vertex names
Date: Wed, 11 Sep 2013 11:11:40 -0400
User-agent: Microsoft-MacOutlook/


I have input my gene interaction network with the gene symbol as an attribute, now I want to calculate the shortest paths between some important genes in the network.
I am using the "igraph_shortest_paths()" function, and I noticed that the "from" and "to" should be vertex ids. Is there some way to use the gene symbol list instead of their ids? That will be much more convenient.  
I had tried that in "R", it works when I provided the gene symbols to "from" and "to". But how can I use gene symbols in a c codes? I think there must be some way to use vertex names instead of ids, which works for all the c functions. 



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